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Finding the Fourth Proportional to 130.12, 195.08 and 72.30

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Solution

The fourth proportional to 130.12, 195.08 and 72.30 is: 108.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.12 : 195.08 = 72.30 : x
  2. Step 2: Convert to fraction form
    130.12/195.08 = 72.30/x
  3. Step 3: Cross multiply
    130.12x = 195.08 × 72.30
  4. Step 4: Simplify right side
    130.12x = 14,104.28
  5. Step 5: Solve for x
    x = 14,104.28/130.12
  6. Step 6: Final answer
    x = 108.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.